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DEHYDRATION REACTION OF ETHANOL OVER BETA ZEOLITE CATALYST |
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| รหัสดีโอไอ | |
| Title | DEHYDRATION REACTION OF ETHANOL OVER BETA ZEOLITE CATALYST |
| Creator | Tanutporn Kamsuwan |
| Contributor | Bunjerd Jongsomjit |
| Publisher | Chulalongkorn University |
| Publication Year | 2558 |
| Keyword | Ethers -- Synthesis, Ethanol, Catalysis, อีเทอร์ -- การสังเคราะห์, เอทานอล, การเร่งปฏิกิริยา |
| Abstract | Three different Al-based solid acid catalysts including H-beta zeolite (HBZ), modified H-beta zeolite with γ-Al2O3 (Al-HBZ) and mixed γ- χ phase of Al2O3 (M-Al) catalysts were investigated for catalytic properties and performance via ethanol dehydration. In addition, DEE production via ethanol dehydration and improvement of catalytic activity were also studied over Ru and Pt modification of H-beta zeolite catalysts demoted as Ru- and Pt- modified H-beta zeolite (Ru-HBZ and Pt-HBZ) catalysts. The catalysts were characterized by X-ray diffraction (XRD), N2 physisorption, scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), NH3-tempearture programmed desorption (NH3-TPD) and thermal gravimetric analysis (TGA). The catalytic activity was tested for ethylene production by dehydration reaction of ethanol in gas phase at atmospheric pressure and temperature between 200 to 400°C. Meanwhile, the time-on-stream of the catalyst for 10 and 72 h during the reaction at suitable temperature was determined for catalytic performance. It was found that the HBZ catalyst exhibited the highest products yield and catalytic activity because it has the highest surface area and amount of weak acid site for catalyzing this reaction. In addition, the modification of HBZ with Ru- and Pt- as promoters could enhance the surface area for opportunity in increasing catalytic activity, which is suitable for ethanol dehydration to DEE. The addition of Ru over HBZ is advantage to increase the DEE yield at 250°C for this condition. The maximum yield of DEE (35%) was obtained from Ru-HBZ at 250°C. |
| URL Website | cuir.car.chula.ac.th |
